Latch construction mounting means



April 27 1948- G. HAGsTRoM 2,440,509'

LATCH .CONSTRUCTION MOUNTING MEANS Filed June 14, 1946 Patented Apr. 27,1948 LATCH CONSTRUCTION MOUNTING MEANS Gotthard Hagstrom, New Haven,Conn., assignor,

by mesne assignments,

ware Corporation, Bri ration of Connecticut to The Pioneer Hard- Ydgeport, Conn., a corpo- Application June 14, 194s, serial No. 676,791 eclaims. (C1. 292-348) The present invention relates to improvements inlatch constructions and relates more particularly to the type of latchconstruction in which two latch-units are employed, each having meansinter-threading with similar means onthe other latch-unit, wherebythetwo said latch-units may be clamped against the respective oppositesides of a door or other closure.

One of the main objects of the present invention is to provide asuperior latch construction of the character referred to and havingsimple, reliable, effective and inconspicuous means whereby onelatch-unit may be conveniently turned with respect to the other to'eiect the clamping of both latch-units in place.

Another object of the present invention is to provide a superior latchconstruction of the character referred to and having one of thelatch-units provided with a wrench-receiving portion and with acover-member movable into and out of positions wherein it alternatelyconceals and exposes the said wrench-receiving portion.

With the above and other objects in view,'as will appear to thoseskilled in the art from the present disclosure, this invention includesall features in the said disclosure which are :novelV over the priorart, and not 'claimed by me in my copending application Serial-No.665,300 led April 26, 1946.

In the accompanying drawings, in which certain modes of carrying out thepresent invention are shown for illustrative purposes:

Fig. 1 is a view of a. latch construction embodying the presentinvention and shown as mounted adjacent the edge of -a door, "theshowing being mainly in plan with the knob, cover-plate, clamping-plateanda portion of oneof the couplingsleeves being in central horizontalsection;

Fig. 2 is a transverse sectional viewV taken on the line 2-2 of Fig. 1but omitting the door in order to View the inner face of theclamping-plate and associated features, the wrench-receiving notch ofthe cover-plate being shown in registry with the similar notch of theclamping-plate;

Fig. 3 is a view similar to Fig. 2 but showing the cover-plate as turnedto conceal the wrenchreceiving notch in the clamping-plate;

Fig, 4 is a broken detail sectional view taken on the line 4-4 of Fig. 3but on a larger scale;

Fig. 5 is a perspective view of the cover-plate or rose detached andviewing the same mainly from its inner face;

Fig. 6 is a similar View 0f the assembly comprising the clamping-plateand its couplingsleeve; and Y Fig. 7 is-a perspective view of aSpanner-Wrench suitable for use in turning the clamping-plate and thecover-plate or rose.

The particular embodiment, chosen for illustration in the accompanyingdrawings forpurposes of making clear a preferred form of thepresentinvention includes a casing I Il adapted to have its inner face seatedagainst the ladjacent face of a door or other closure '.II and providedcentrally with an externally-threaded rigidcoupling-sleeve I2. The saidcoupling-sleeve projects in .tq the adjacent end of a clearance-passageI3 formfedin the door I I, as is indicated in Figgl. "V 1; Seatedagainstthe face of the door oppositethe casing I0 is anescutcheon-platefunitjjgenerally designated by the reference characterI4 and comprising a relatively-thick entrally-apeituretl clamping-plateI5 and!` 'a Vrc1atively-t hi1 1` cupshaped cover-plate'or rosel. A Y Y AY Y The central portion of: theclampng-plate vl5 above referred tolispressed to provide an oisetportion I'l surrounding the aperture inthesaid clamping-plate and normallyseatedagainst the adjacent face Aofthedoor IIQas is', indicated in Fig. 1. RivetedV or otherwise rigidlyunited with the offset-portion I 'l of the Vclamping plate I 5,is aninternally threaded coupling sleeve A I8 threadedly receiving theexternally-threaded coupling-sleeve I2 before referred to. In its `outerperiphery, the clamping-plate I5 isformed Vwith a wrench-receiving notchI9,Vfor`1purposes as will hereinafter appear. Y Y 'Ihe cup-shapedcover-'plate orrose I6 before referred to has its annular flange 20extending in an axial direction over the outer periphery 'of 'theclamping-plate I5 and providedwith a clearancenotch 20a. At its freeedge, the ilange 2liV is formed with four (more or less)retaining-fingers 2| which are bent over against ythe'inner face of theclamping-plate I5 to retain the latter and the cover-plate in assembledrelationship, while permitting relative rotation t'o'take placeVwhen'desired, between the said clamping-plate I5 and the cover-plateI6. Y

The cover-plate I6, in addition to its flange 20, also includes aface-portion 22 covering the outer face of the clamping-plate l5and'liaving its center apertured and pressedoutwardly .to provide an.offset-portion. 23. Rotatably connected to the olfset-portion 23 justreferred to,` isa knob or other suitable operating-member 2Q, asisVshown inlFig. 1.

In order to connect the'knob 24 or itsequivalent with the cover-plate orroseV I 6 in such manner as to permit relative'rotation. the said knob24'is 3 provided with a relatively-slender neck 25. The said neckextends through the aperture in the center of the offset-portion 23 andis burrecl or riveted over as at 26 against the inner face of a washer21. The neck 25 also extends through the washer 2-`I whilethellatterbears against the inner face of the oisetfportion 23 and turns thereonwhen the knob 24 is rotated.

The knob 24 or other suitable o-perating-rneln-- A e ber is, in a mannerusual in the art, provided with an axial passage 28 of square or othersuitable non-circular form in cross section.A Thesaid passage 28receives the adjacentend oa spindle-.29.'

projecting freely through the couplingsleeves- I2 and I8 as well asthrough the casing IIi, from a lever-handle 30 or other suitableoperatingclamping-plate I5,

member. The spindle 29 has a cross-*sectionalA form substantiallycorresponding to the crossfsec f tional form of the passage 28 in theknob 2li and isurigi'd with the lever-handle 30,` VIn this manner,theknobf24 and leverhandle Siiar'e coupled together fdr concurrentmovement by the' spindle 29 inthe; event that either the' saidV knoborthe said'r leverh'andle' maiiiiallytiirned.

Iliemfriotion'enga'gm nt between the coverplate I'I and thefcl'ainpingjlate I5 is greatly in excess., of v the very slightfrictiiflal 'engagement betweenftheknob '2 lI` 'andthe vsaid cover-plate' so @hat unlepj normar jcdindjriswnenj the knob ze is turneditgiml-l net e'ffet 'nie' 'of the @we pleief Y Projecting oulatch-member@ mercenari# afresngndief-2Q-r dees, nt Ferseformin-ven'ti'Y @ne/"form of'be my copending a notch IQinjj/heclamping-plate i'itfherebyfexposing the said notch I9 in themanner-shown in Figs. a1 and 2.- y./.kny suit-abletool maybe insertedinto the' nowexposed rw renc' lin eceivirig notch la to eiect theturningmovementwof the clamping--V plate l5 and. hence.itsscoupling-sleeve iB Wiih respect to the couplingasleeve I2. Inthismanner, the inner face or thesaid:'Clamping-plaie may be firmly-'seatedagainst `.the-adjacent face of the door II, while at the same timedrawing the inner faceofi thecasing Ifinto firm seated engagement Withthe: opposite facejof the said dorf. i ;J.-l.;; j

After the clamping-plate I5 has been tightened,

For the purposes of turning the clamping-plate I5 and cover-plate I6, Ihave found it most conlo venient to employ a Spanner-wrench 33 of thegeneral character'iflli'strated in Fig. '7. The said spanner-wrench 33is` formed at one end with a vshtar'ji 'lldirnoned so as to freelyextend througitheTjelarance-notch 20a in the flange 2U 'andintothe'wrench-receiving notch I9 in the Y v in the manner indicated bybrkenliines' irl-Fig'. V2. Extending outwardly from thearnrtd is a nger35 suiciently narrower than the said arm to leave a portion of the endof the latter. unencumbered t6 provide a stop-shoulder se.' Tneed'ge erftir 'scanner-wrench; adacent the afin'Y figrv 35 f'jl Ion'g'itl'ldinellycurved as atie-Ito sutstantially `c 'si-lforfn lte the prphral cht'if..f thflaig EUMC@ the @ever-plate-lsjr n i 1 the, 'stop-shaun@ mislima thepenetration of the fingern warmnav, permit: the same to extend ,into theWenh1re eivir1g-mth-lmince sembly, the procedures: above referred to maybe reversed.

Y The inveniifmsmay beren-istitu@ in zother Spigwavs. than time Herein-Set terbil Without departing from; triespiti-tandessentialfoharaoteriSiGS' 0fihenventibn. and the presentembodimentsarefftherefore, Lobe considered in. all ree spectsasillustrative-andnot restrict-ive,v andvall changes comingy irfitlflin;theN inea-ning and equive alency rangeof the-appendedfolaims are:intended to be embraced therein; j

1. A' latch-fcon's`truction, includinggi'in "combinata tion: afirst'latcheunit designed adradaptedifor engagement with onfaceeofjf afdoorandrprovided with althreadedfportion having its axis' extend-ing in a.;directionV transverse ot surchf door; "and Va second'latcheunitfdesigndand4 adaptpe'dfor" engagement Withfthefopposite 4face of: V the doorfrom the said iirstiatcheunit `and providedV With-athreadedjportion'threadedly engageable With'the threaded portion ot thesaidrirst' latch-unitJ and jointly therewithl providing \couplingeingangYV 4 t0 couple the two v'latcli-funifts togetlfrenj;v jonego` Athe saidlatch-units including a'larnpingemember rigid with itssaidfthreadedfportioneandiformed with a Wrenchereceiving; recessvconstructed and arranged to receive a tfool whereby the clampingmernberand its rigid threaded portion may be turned with-respect to thethreaded portion of the otherlatch-unit' to -clamp a door betweenthe twosaid latch-units; and a cover-member covering the outer face of the saidclamping-member and'formed with a clearance-opening located so as to bemovable into and out of registry with the wrench-receiving recess oi theclampingmember, thev said cover-member being rotatable with respect tothe said clamping-member to move its clearance-opening into and out ofregistry with the wrench-receiving recess in the clamping-member.

2. A latch construction, including in combination: a rst latch-unitdesigned and adapted for engagement with one face of a door and providedwith a threaded portion having itsaxis extending in a directiontransverse of such door; and a second latch-unit designed and adaptedfor engagement with the opposite face of the door from the said firstlatch-unit and provided with afthreaded portion threadedly engageablewith the threaded portion of the said rst latch-unit and jointlytherewith providing coupling-means to couple the two latch-unitstogether; one of the said latch-units including a clamping-plate rigidwith its said threaded portion and formed in its periphery with awrench-receiving notch constructed and arranged to receive a toolwhereby the clamping-plate and its rigid threaded portion may be turnedwith respect to the threaded portion of the other latch-unit to clamp a-door between the-two said latch-units, and a coverplate covering theouter face cf the said clamping-plate and formed in its periphery with aclearance-opening located so as to be movable into and out of registrywith the wrench-receiving notch in the said clamping-plate, the saidcoverplate being rotatable with respect to the said clamping-plate tomove its clearance-opening into and out of registry with thewrench-receiving notch in the said clamping-plate.

3. A latch construction, including in combination: a iirst latch-unitdesigned and adapted for engagement with one face bf a door and providedwith a threaded coupling-sleeve having its axis extending in a directiontransverse of such door, the said iirst latch-unit having anoperatingmember associated therewith; a second latchunit designed andadapted for engagement with the opposite face of the door from the saidrst latch-unit vand also provided with a threaded coupling-sleevethreadedly engageable with the coupling-sleeve of the said iirstlatch-unit, the said second latch-unit also having an operatingmemberassociated therewith; one of the said latch-units including aclamping-member rigid with its said coupling-sleeve and formed with awrench-receiving recess constructed and arranged to receive a toolwhereby the clampingmember and its rigid coupling-sleeve may be turnedwith respect to the coupling-sleeve of the other latch-unit to clamp adoor ibetween the two said latch-units, and a cover-member covering theouter face of the said clamping-member and formed with aclearance-opening located so as to be movable into and out of registrywith the wrench-receiving recess of the clamping-member, the saidcover-member being rotatable with respect to the said clamping-member tomove its clearance-opening into and out oi registry with thewrench-receiving recess in the said clampingmember; and a spindleextending through both of the said coupling-sleeves and operativelyinterconnecting the respective operating-members of the two saidlatch-units,

\ 4. A latchconstruction, including in combina:r tion: a iirstlatch-unit designed and adapted for; engagement with one face of a doorand provided with a threaded coupling-sleeve having its axis extendingin a direction transverse of such door, the said iirst latch-unit havingan operatingmember associated therewith; a second latch-unit designedand adapted for engagement with the opposite falce of the door from thesaid rst'latchunit and also provided with a threaded couplingsleevethreadedly engagea-ble with the couplingsleeve of the said rstlatch-unit, the saidsecond latch-unit also having an sociated therewith;one of the said latch-units including a` clamping-plate rigid with itssaid coupling-sleeve and formed in its periphery with afwrench-receiving. notch constructed. and `arranged to receive 'a toolwhereby the clampingpllate 4and its rigid coupling-sleeve may be turnedwith respect to the coupling-sleeve of. the other latch-unit to clamp adoor between the rtwo said latch-units, and a cover-plate covering theouter face of the said clamping-plate and formed in its periphery with aclearance-opening located so as to be movable into and out of registrywith the wrench-receiving notch in the said clampingplate, the saidcover-plate being rotatable with respect to the said clamping-plate tomove its clearance-opening into and out of registry with thewrench-receiving notch in the said clampingplate; and a spindleextending through both of the said coupling-sleeves :and operativelyinterconnecting the respective operating-members of the two saidlatch-units.

5. A latch construction, including in combination: a iirst latch-unitdesigned and adapted for engagement with one face of a door and providedwith a threaded portion having its axis extending in a directiontransverse of such door; and a second latch-unit designed and adaptedfor engagement with the opposite face of the door from the said iirstlatch-unit and provided with a threaded portion threadedly engageablewith the threaded portion of the said iirst latch-unit and jointlytherewith providing coupling-means to couple the two latch-unitstogether; one of the said latch-units including a clamping-plate rigidwith its said threaded portion and formed in its periphery with awrenchreceivin-g notch constructed and arranged to receive a toolwhereby the clamping-plate and its rigid threaded portion may be turnedwith respect to the threaded portion of the other latch-unit to clamp adoor between thetwo said latch-units, anda cup-shaped cover-platecovering the outer face of the said clamping-plate and having an annularange extending over the periphery of the said clamping-plate andterminating in means engaging the inner face of the said clamping-plate,the flange of the'said cover-plate being formed with a clearance-openingmovable into and out of registry with the wrench-receiving notch in thesaid clampingplate, the said cover-plate being rotatable with respect tothe said clamping-plate to move its clearance-opening into and out ofregistry with the wrench-receiving notch in the said clampingplate.

6. A latch construction, including in combination: a first latch-unitdesigned and adapted for engagement with one face of a door and providedwith a threaded coupling-sleeve having its axis extending in a directiontransverse. of such door, the said irst latch-unit having anoperating-member associated therewith; a secoperating-member. aslIateh-unitdesigned. arieh adaptedorren'gageoppositeziice of' the; fromthe msi. latchavmitl amclA alam provided; with; aithreaddcau-pl'mg-sleeize. threadeddyfA engage.-y ahleg. with.- thef,`csrmllilngrseeizev @i the? said. re latchfunit; the sairiksecondflabchfurt also ham4 ingi operating-member; associated therewitm; uneoftheisazidilatchfunits including@L damning: piaghe;Sigi-1d,` vizi-ish;`its sai@V @Clipline-sleeve and initsperiphery with, a. wrenchereceiving*metck: constructed:w endiarranged:tofreceive animal; Wherebywtheffeiampingfplate. and its. rigidi coni:-l plingfsleevef maybe* turned.with respect; to; the emxplillgf'sleeve.4 oi: the., otherf1zmich,-u1r1:itv to; clamp av. deozrrrbetween; the twofsaid;laitehfunts; :md-.-l a mipshaiped covereplate.- coifernI the outer: faceof; thezsaidz 'clamping-plate and'- hav-ingr auf nulanfiangezextending.over-theL periphery of the. said1-e1aamping-plateand' terminating in`means engafgri'githe inner lili face; oit the; saiflv clamping* 2Qormednwithf a.; clearancefoneningf mui/tablier into and.; out, ofregistry4 with the, wreneh-lieeeiying' nntchrim the;saidicl'ampnV-plate; the said covertpl-aite being; miei-sable withrespecttQf the said. ciampifngrplanef te mwey its clearance-opening,iniofarld: (mi:i of; registry: withA thefwrench-receiw ingincmch thesaid cla-.rnpingrplate-iv and: ai spindle: exteiapftirigl thmugh bathof:V thef said: @angling-sleeves and: operatively interconnectingthevrespetivefQperaitngrmembers. ofthe t'milcrsaiid4 latch-units i Y *lGOTTHARDf M REFERENCES; CITED' j Y The' folloivving,` referencesaare of4record'V in the@ ie-ol thispatentt# Y UNITED STATES PATENTS

